good questions, jim. 

1) i recommend using nfl.com for stats.  they appear to be the most official & always have all the stats we are looking for.  for offensive players, i have found that the Game Stats page always has all of the info.  for defensive players & team D, i recommend using the GameBook page.  it has all of the stats you could ever want.  it may take awhile to find them initially, but once you do, it'll be easy every time after that.

2) forced fumbles & recovered fumbles are completely different.  if you go to the <a href='http://www.nfl.com/gamecenter/gamebook/NFL_20050912_PHI@ATL'>Game Book</a> page for the iggles-falcons game & look under the Final Defensive Statistics section, you will see that the eagles totaled 3 forced fumbles & 2 recovered fumbles.  so enter those values in the appropriate boxes.

let me know if there are other questions.